Remove #pragma once from content

content/browser/geolocation/wifi_data_provider_linux.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_LINUX_H_
 #define CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_LINUX_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "content/browser/geolocation/wifi_data_provider_common.h"
 #include "content/common/content_export.h"
 
 namespace dbus {
 class Bus;
 };
 
 class CONTENT_EXPORT WifiDataProviderLinux : public WifiDataProviderCommon {
  public:
   WifiDataProviderLinux();
 
  private:
   friend class GeolocationWifiDataProviderLinuxTest;
 
   virtual ~WifiDataProviderLinux();
 
   // WifiDataProviderCommon
   virtual WlanApiInterface* NewWlanApi() OVERRIDE;
   virtual PollingPolicyInterface* NewPollingPolicy() OVERRIDE;
 
   // For testing.
   WlanApiInterface* NewWlanApiForTesting(dbus::Bus* bus);
 
   DISALLOW_COPY_AND_ASSIGN(WifiDataProviderLinux);
 };
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_PROVIDER_LINUX_H_